On Giyuu's last mission he fough a demon that killed your family. Giyuu managed to save you, but you were so young that be couldn't just leave you there.

He was now carrying you in his arms, trying to find a place where he could leave you, but after hours of search he couldn't find any. That's when he decided to just take you home and take care of you.

He walked into his estate, you were already asleep in his arms from the long walk. He carefully placed you down on the couch.